It can be caused by mutation, random mating, random fertilization, and recombination.
Hope this helps :)
The answer is,Different animals with similar structures:)
Answer:
Explanation:
an example is the ability to endure the sugar, lactose, in milk. In many places of the world, people can't drink milk in light of the fact that their body turns off the intestinal creation of lactase, a chemical that processes the sugar in the milk.
